[78-L] did we ever find consensus as to how to clean these things(Diamond Discs)

[martha]

 I think the wretchedly noisy Edison pressings from the late Teens are brushed Condensite on wood-flour base.   China clay 
and paper labels were more or less coincident, methinks.


----- Original Message ----- 
From: "Michael Biel" <mbiel at mbiel.com>
>
> 2) There are two distinctly different types of Diamond Discs.  The early
> ones have CELLULOID surfaces which were laid on as a sheet onto the wood
> flour core.  It is only later that the surfaces became CONDENSITE which
> was brushed on as a liquid in several coatings.  I am not sure if the
> core was changed to China Clay at the same time as the switch to
> Condensite, so there might be two types of Condensite discs.